diff --git a/include/boost/lambda/core.hpp b/include/boost/lambda/core.hpp
index de92e77..e330259 100644
--- a/include/boost/lambda/core.hpp
+++ b/include/boost/lambda/core.hpp
@@ -31,11 +31,11 @@ using ::boost::tuples::null_type;
 #include "boost/lambda/detail/lambda_config.hpp"
 #include "boost/lambda/detail/lambda_fwd.hpp"
 
+#include "boost/lambda/detail/arity_code.hpp"
+#include "boost/lambda/detail/actions.hpp"
+
 #include "boost/lambda/detail/lambda_traits.hpp"
 
-#include "boost/lambda/detail/arity_code.hpp"
-
-#include "boost/lambda/detail/actions.hpp"
 #include "boost/lambda/detail/function_adaptors.hpp"
 #include "boost/lambda/detail/return_type_traits.hpp"